Carl "Calle" Oscar Westergren (13 October 1895 – 5 August 1958) was a Swedish wrestler who competed in the 1920, 1924, 1928, and 1932 Summer Olympics. He won gold medals in Greco-Roman wrestling in 1920, 1924 and 1932; in 1924 he also finished sixth in freestyle wrestling.
|Born||13 October 1895|
|Died||5 August 1958 (aged 62)|
|Weight||+ 87 kg (192 lb)|
In Greco-Roman wrestling Westergren also won the world middleweight title in 1922, as well as three European titles in different weight classes: middleweight in 1925, light-heavyweight in 1930, and unlimited in 1931. He worked as a bus driver and had two elder brothers who also trained in wrestling. He later became a keen pigeon breeder.